Granted Patent
Utility
US 5,198,623 · App. 07/799,570
Method for use in a digitizer for determining pen tilt
Inventor:
Waldo L. Landmeier
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Nov 27, 1991
Inventor
Waldo L. Landmeier
Assignee (at issue)
CalComp Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.